You may ask, why should I list my station? The answer is simple. If people don't know that your station exists, they're not going to listen. It's as simple as that. Therefore, you should list your station in every single place you can find.
There are a TON of radio station listing sites. Don't ignore *ANY* of them. Even if you think the site looks mediocre, list yourself anyways. If you only gain one listener from a listing, that listing has done its job. Even the directories that you haven't heard of are essential for audience growth.
Something else that is important to do is to keep track of where you have submitted your station. Write it down. Keep it in a document. Whatever you have to do to remember where you listed yourself. It's important to visit this sites periodically to ensure that your station has in fact been listed, and it's also important to check on your listing periodically to ensure that the listing is still active and working properly. Stations are delisted all the times without notice, so checking on your listings is very important.
So, the most important question. Where can I list my station?
http://www.radiolist.net/ - (send the request to firstname.lastname@example.org)
Going through and listing yourself on each of these sites is very time consuming and it can be a lot of work. Your station will not grow overnight, and it will certainly not grow unless you put forth the time and effort to maintain your listings.
If you come across a site that should be added to this list, please let us know!
Best of luck!